diff options
| author | Dylan Yudaken <dyudaken@gmail.com> | 2023-07-25 20:29:44 +0100 |
|---|---|---|
| committer | Aleksandr Nogikh <nogikh@google.com> | 2023-07-30 13:35:50 +0000 |
| commit | 458a107b4b78803973245909f1f3ab19081ca63b (patch) | |
| tree | 07d4399418cd05a66f939eb35f4f0047e372023a /pkg | |
| parent | 924768299f97ac88b84f09eb979919305c8af5bb (diff) | |
sys/linux/io_uring, executor/common_linux: fix io_uring segfault
In Linux 6.4+ it is not allowed to provide a vma to mmap(2) [1]. Change
the API to request the address from the Kernel.
Note I do not know why this was done in the first place, but it seems
not to be useful.
[1]: https://github.com/torvalds/linux/commit/d808459b2e31bd5123a14258a7a529995db974c8
Diffstat (limited to 'pkg')
| -rw-r--r-- | pkg/csource/generated.go | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/pkg/csource/generated.go b/pkg/csource/generated.go index 4f704ebf9..019cd1582 100644 --- a/pkg/csource/generated.go +++ b/pkg/csource/generated.go @@ -4447,23 +4447,21 @@ struct io_uring_params { #include <sys/mman.h> #include <unistd.h> -static long syz_io_uring_setup(volatile long a0, volatile long a1, volatile long a2, volatile long a3, volatile long a4, volatile long a5) +static long syz_io_uring_setup(volatile long a0, volatile long a1, volatile long a2, volatile long a3) { uint32 entries = (uint32)a0; struct io_uring_params* setup_params = (struct io_uring_params*)a1; - void* vma1 = (void*)a2; - void* vma2 = (void*)a3; - void** ring_ptr_out = (void**)a4; - void** sqes_ptr_out = (void**)a5; + void** ring_ptr_out = (void**)a2; + void** sqes_ptr_out = (void**)a3; uint32 fd_io_uring = syscall(__NR_io_uring_setup, entries, setup_params); uint32 sq_ring_sz = setup_params->sq_off.array + setup_params->sq_entries * sizeof(uint32); uint32 cq_ring_sz = setup_params->cq_off.cqes + setup_params->cq_entries * SIZEOF_IO_URING_CQE; uint32 ring_sz = sq_ring_sz > cq_ring_sz ? sq_ring_sz : cq_ring_sz; - *ring_ptr_out = mmap(vma1, ring_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE | MAP_FIXED, fd_io_uring, IORING_OFF_SQ_RING); + *ring_ptr_out = mmap(0, ring_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, fd_io_uring, IORING_OFF_SQ_RING); uint32 sqes_sz = setup_params->sq_entries * SIZEOF_IO_URING_SQE; - *sqes_ptr_out = mmap(vma2, sqes_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE | MAP_FIXED, fd_io_uring, IORING_OFF_SQES); + *sqes_ptr_out = mmap(0, sqes_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, fd_io_uring, IORING_OFF_SQES); return fd_io_uring; } |